Which of the following was not one of the major events of world war ll prior to December 1941?

AJapan invaded french Indochina and threatened Thailand, The Philippines, and other Pacific nations.

BDemocratic countries in Europe appeased Hitler by letting Hitler take the Sudetenland, Czechoslovakia, and Austria.

CThe United States declared war as a result of Germany's invasion of Poland.

DJapan occupied Manchuria and other parts of China.